/// <summary>
/// Exports materials for host object.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC object.</param>
/// <param name="hostObject">The host object.</param>
/// <param name="elemHnds">The host IFC handles.</param>
/// <param name="geometryElement">The geometry element.</param>
/// <param name="productWrapper">The ProductWrapper.</param>
/// <param name="levelId">The level id.</param>
/// <param name="direction">The IFCLayerSetDirection.</param>
/// <param name="containsBRepGeometry">True if the geometry contains BRep geoemtry. If so, we will export an IfcMaterialList</param>
/// <returns>True if exported successfully, false otherwise.</returns>
public static bool ExportHostObjectMaterials(ExporterIFC exporterIFC, HostObject hostObject,
IList <IFCAnyHandle> elemHnds, GeometryElement geometryElement, ProductWrapper productWrapper,
ElementId levelId, Toolkit.IFCLayerSetDirection direction, bool containsBRepGeometry, IFCAnyHandle typeHnd = null)
{
if (hostObject == null)
{
return(true); //nothing to do
}
if (elemHnds == null || (elemHnds.Count == 0))
{
return(true); //nothing to do
}
IFCFile file = exporterIFC.GetFile();
using (IFCTransaction tr = new IFCTransaction(file))
{
//if (productWrapper != null)
// productWrapper.ClearFinishMaterials();
double scaledOffset = 0.0, scaledWallWidth = 0.0, wallHeight = 0.0;
Wall wall = hostObject as Wall;
if (wall != null)
{
scaledWallWidth = UnitUtil.ScaleLength(wall.Width);
scaledOffset = -scaledWallWidth / 2.0;
BoundingBoxXYZ boundingBox = wall.get_BoundingBox(null);
if (boundingBox != null)
{
wallHeight = boundingBox.Max.Z - boundingBox.Min.Z;
}
}
List <ElementId> matIds;
IFCAnyHandle primaryMaterialHnd;
IFCAnyHandle materialLayerSet = ExporterUtil.CollectMaterialLayerSet(exporterIFC, hostObject, productWrapper, out matIds, out primaryMaterialHnd);
// For IFC4 RV, material layer may still be created even if the geometry is Brep/Tessellation
if ((containsBRepGeometry && matIds.Count > 0) &&
!(ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView && !IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet)))
{
foreach (IFCAnyHandle elemHnd in elemHnds)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, matIds);
}
}
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet))
{
// If there is an override for creating IfcMaterial instead of IfcMaterialLayer for a single material/layer, assign the material directly to type or element(s)
if (IFCAnyHandleUtil.IsTypeOf(materialLayerSet, IFCEntityType.IfcMaterial))
{
if (typeHnd != null)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, typeHnd, materialLayerSet);
}
//else
//{
foreach (IFCAnyHandle elemHnd in elemHnds)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, materialLayerSet);
}
//}
}
else
{
// IfcMaterialLayerSetUsage is not supported for IfcWall, only IfcWallStandardCase.
IFCAnyHandle layerSetUsage = null;
for (int ii = 0; ii < elemHnds.Count; ii++)
{
IFCAnyHandle elemHnd = elemHnds[ii];
if (IFCAnyHandleUtil.IsNullOrHasNoValue(elemHnd))
{
continue;
}
SpaceBoundingElementUtil.RegisterSpaceBoundingElementHandle(exporterIFC, elemHnd, hostObject.Id, levelId);
// Even if it is Tessellated geometry in IFC4RV, the material layer will still be assigned
if (containsBRepGeometry && !ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView)
{
continue;
}
HashSet <IFCAnyHandle> relDecomposesSet = IFCAnyHandleUtil.GetRelDecomposes(elemHnd);
IList <IFCAnyHandle> subElemHnds = null;
if (relDecomposesSet != null && relDecomposesSet.Count == 1)
{
IFCAnyHandle relAggregates = relDecomposesSet.First();
if (IFCAnyHandleUtil.IsTypeOf(relAggregates, IFCEntityType.IfcRelAggregates))
{
subElemHnds = IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(relAggregates, "RelatedObjects");
}
}
bool hasSubElems = (subElemHnds != null && subElemHnds.Count != 0);
bool isRoof = IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcRoof);
bool isDisallowedWallType = (IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcWall) && !ExporterCacheManager.ExportOptionsCache.ExportAs4);
// Create IfcMaterialLayerSetUsage unless we have sub-elements, are exporting a Roof, or are exporting a pre-IFC4 IfcWall.
if (!hasSubElems && !isRoof && !isDisallowedWallType)
{
bool materialAlreadyAssoc = false;
if (typeHnd != null)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, typeHnd, materialLayerSet);
//materialAlreadyAssoc = true;
}
if (ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView)
{
if (!materialAlreadyAssoc)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, materialLayerSet);
}
}
else
{
if (layerSetUsage == null)
{
bool flipDirSense = true;
if (wall != null)
{
// if we have flipped the center curve on export, we need to take that into account here.
// We flip the center curve on export if it is an arc and it has a negative Z direction.
LocationCurve locCurve = wall.Location as LocationCurve;
if (locCurve != null)
{
Curve curve = locCurve.Curve;
Transform lcs = Transform.Identity;
bool curveFlipped = GeometryUtil.MustFlipCurve(lcs, curve);
flipDirSense = !(wall.Flipped ^ curveFlipped);
}
}
else if (hostObject is CeilingAndFloor)
{
flipDirSense = false;
}
double offsetFromReferenceLine = flipDirSense ? -scaledOffset : scaledOffset;
IFCDirectionSense sense = flipDirSense ? IFCDirectionSense.Negative : IFCDirectionSense.Positive;
layerSetUsage = IFCInstanceExporter.CreateMaterialLayerSetUsage(file, materialLayerSet, direction, sense, offsetFromReferenceLine);
}
ExporterCacheManager.MaterialLayerRelationsCache.Add(layerSetUsage, elemHnd);
}
}
else
{
if (hasSubElems)
{
foreach (IFCAnyHandle subElemHnd in subElemHnds)
{
// TODO: still need to figure out the best way to create type for the sub elements because at this time a lot of information is not available, e.g.
// the Revit Element to get the type, other information for name, GUID, etc.
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(subElemHnd))
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, subElemHnd, materialLayerSet);
}
}
}
else if (!isRoof)
{
if (typeHnd != null)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, typeHnd, materialLayerSet);
}
else
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, materialLayerSet);
}
}
else if (primaryMaterialHnd != null)
{
if (typeHnd != null)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, typeHnd, materialLayerSet);
}
else
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, materialLayerSet);
}
}
}
}
}
}
tr.Commit();
return(true);
}
}
/// <summary>
/// Exports materials for host object.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC object.</param>
/// <param name="hostObject">The host object.</param>
/// <param name="elemHnds">The host IFC handles.</param>
/// <param name="geometryElement">The geometry element.</param>
/// <param name="productWrapper">The ProductWrapper.</param>
/// <param name="levelId">The level id.</param>
/// <param name="direction">The IFCLayerSetDirection.</param>
/// <param name="containsBRepGeometry">True if the geometry contains BRep geoemtry. If so, we will export an IfcMaterialList</param>
/// <returns>True if exported successfully, false otherwise.</returns>
public static bool ExportHostObjectMaterials(ExporterIFC exporterIFC, HostObject hostObject,
IList <IFCAnyHandle> elemHnds, GeometryElement geometryElement, ProductWrapper productWrapper,
ElementId levelId, Toolkit.IFCLayerSetDirection direction, bool containsBRepGeometry)
{
if (hostObject == null)
{
return(true); //nothing to do
}
if (elemHnds == null || (elemHnds.Count == 0))
{
return(true); //nothing to do
}
IFCFile file = exporterIFC.GetFile();
using (IFCTransaction tr = new IFCTransaction(file))
{
//if (productWrapper != null)
// productWrapper.ClearFinishMaterials();
double scaledOffset = 0.0, scaledWallWidth = 0.0, wallHeight = 0.0;
Wall wall = hostObject as Wall;
if (wall != null)
{
scaledWallWidth = UnitUtil.ScaleLength(wall.Width);
scaledOffset = -scaledWallWidth / 2.0;
BoundingBoxXYZ boundingBox = wall.get_BoundingBox(null);
if (boundingBox != null)
{
wallHeight = boundingBox.Max.Z - boundingBox.Min.Z;
}
}
//ElementId typeElemId = hostObject.GetTypeId();
//IFCAnyHandle materialLayerSet = ExporterCacheManager.MaterialSetCache.Find(typeElemId);
//// Roofs with no components are only allowed one material. We will arbitrarily choose the thickest material.
//IFCAnyHandle primaryMaterialHnd = ExporterCacheManager.MaterialSetCache.FindPrimaryMaterialHnd(typeElemId);
//if (IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet))
//{
// HostObjAttributes hostObjAttr = hostObject.Document.GetElement(typeElemId) as HostObjAttributes;
// if (hostObjAttr == null)
// return true; //nothing to do
// List<ElementId> matIds = new List<ElementId>();
// List<double> widths = new List<double>();
// List<MaterialFunctionAssignment> functions = new List<MaterialFunctionAssignment>();
// ElementId baseMatId = CategoryUtil.GetBaseMaterialIdForElement(hostObject);
// CompoundStructure cs = hostObjAttr.GetCompoundStructure();
// if (cs != null)
// {
// //TODO: Vertically compound structures are not yet supported by export.
// if (!cs.IsVerticallyHomogeneous() && !MathUtil.IsAlmostZero(wallHeight))
// cs = cs.GetSimpleCompoundStructure(wallHeight, wallHeight / 2.0);
// for (int i = 0; i < cs.LayerCount; ++i)
// {
// ElementId matId = cs.GetMaterialId(i);
// if (matId != ElementId.InvalidElementId)
// {
// matIds.Add(matId);
// }
// else
// {
// matIds.Add(baseMatId);
// }
// widths.Add(cs.GetLayerWidth(i));
// // save layer function into ProductWrapper,
// // it's used while exporting "Function" of Pset_CoveringCommon
// functions.Add(cs.GetLayerFunction(i));
// }
// }
// if (matIds.Count == 0)
// {
// matIds.Add(baseMatId);
// widths.Add(cs != null ? cs.GetWidth() : 0);
// functions.Add(MaterialFunctionAssignment.None);
// }
// // We can't create IfcMaterialLayers without creating an IfcMaterialLayerSet. So we will simply collate here.
// IList<IFCAnyHandle> materialHnds = new List<IFCAnyHandle>();
// IList<int> widthIndices = new List<int>();
// double thickestLayer = 0.0;
// for (int ii = 0; ii < matIds.Count; ++ii)
// {
// // Require positive width for IFC2x3 and before, and non-negative width for IFC4.
// if (widths[ii] < -MathUtil.Eps())
// continue;
// bool almostZeroWidth = MathUtil.IsAlmostZero(widths[ii]);
// if (!ExporterCacheManager.ExportOptionsCache.ExportAs4 && almostZeroWidth)
// continue;
// if (almostZeroWidth)
// widths[ii] = 0.0;
// IFCAnyHandle materialHnd = CategoryUtil.GetOrCreateMaterialHandle(exporterIFC, matIds[ii]);
// if (primaryMaterialHnd == null || (widths[ii] > thickestLayer))
// {
// primaryMaterialHnd = materialHnd;
// thickestLayer = widths[ii];
// }
// widthIndices.Add(ii);
// materialHnds.Add(materialHnd);
// if ((productWrapper != null) && (functions[ii] == MaterialFunctionAssignment.Finish1 || functions[ii] == MaterialFunctionAssignment.Finish2))
// {
// productWrapper.AddFinishMaterial(materialHnd);
// }
// }
// int numLayersToCreate = widthIndices.Count;
// if (numLayersToCreate == 0)
// return false;
// if (!containsBRepGeometry)
// {
// IList<IFCAnyHandle> layers = new List<IFCAnyHandle>(numLayersToCreate);
// for (int ii = 0; ii < numLayersToCreate; ii++)
// {
// int widthIndex = widthIndices[ii];
// double scaledWidth = UnitUtil.ScaleLength(widths[widthIndex]);
// IFCAnyHandle materialLayer = IFCInstanceExporter.CreateMaterialLayer(file, materialHnds[ii], scaledWidth, null);
// layers.Add(materialLayer);
// }
// string layerSetName = exporterIFC.GetFamilyName();
// materialLayerSet = IFCInstanceExporter.CreateMaterialLayerSet(file, layers, layerSetName);
// ExporterCacheManager.MaterialSetCache.Register(typeElemId, materialLayerSet);
// ExporterCacheManager.MaterialSetCache.RegisterPrimaryMaterialHnd(typeElemId, primaryMaterialHnd);
// }
List <ElementId> matIds;
IFCAnyHandle primaryMaterialHnd;
IFCAnyHandle materialLayerSet = ExporterUtil.CollectMaterialLayerSet(exporterIFC, hostObject, productWrapper, out matIds, out primaryMaterialHnd);
if (containsBRepGeometry && matIds.Count > 0)
{
foreach (IFCAnyHandle elemHnd in elemHnds)
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, elemHnd, matIds);
}
}
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(materialLayerSet))
{
// IfcMaterialLayerSetUsage is not supported for IfcWall, only IfcWallStandardCase.
IFCAnyHandle layerSetUsage = null;
for (int ii = 0; ii < elemHnds.Count; ii++)
{
IFCAnyHandle elemHnd = elemHnds[ii];
if (IFCAnyHandleUtil.IsNullOrHasNoValue(elemHnd))
{
continue;
}
SpaceBoundingElementUtil.RegisterSpaceBoundingElementHandle(exporterIFC, elemHnd, hostObject.Id, levelId);
if (containsBRepGeometry)
{
continue;
}
HashSet <IFCAnyHandle> relDecomposesSet = IFCAnyHandleUtil.GetRelDecomposes(elemHnd);
IList <IFCAnyHandle> subElemHnds = null;
if (relDecomposesSet != null && relDecomposesSet.Count == 1)
{
IFCAnyHandle relAggregates = relDecomposesSet.First();
if (IFCAnyHandleUtil.IsTypeOf(relAggregates, IFCEntityType.IfcRelAggregates))
{
subElemHnds = IFCAnyHandleUtil.GetAggregateInstanceAttribute <List <IFCAnyHandle> >(relAggregates, "RelatedObjects");
}
}
bool hasSubElems = (subElemHnds != null && subElemHnds.Count != 0);
bool isRoof = IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcRoof);
bool isDisallowedWallType = (IFCAnyHandleUtil.IsTypeOf(elemHnd, IFCEntityType.IfcWall) && !ExporterCacheManager.ExportOptionsCache.ExportAs4);
// Create IfcMaterialLayerSetUsage unless we have sub-elements, are exporting a Roof, or are exporting a pre-IFC4 IfcWall.
if (!hasSubElems && !isRoof && !isDisallowedWallType)
{
if (layerSetUsage == null)
{
bool flipDirSense = true;
if (wall != null)
{
// if we have flipped the center curve on export, we need to take that into account here.
// We flip the center curve on export if it is an arc and it has a negative Z direction.
LocationCurve locCurve = wall.Location as LocationCurve;
if (locCurve != null)
{
Curve curve = locCurve.Curve;
Plane defPlane = new Plane(XYZ.BasisX, XYZ.BasisY, XYZ.Zero);
bool curveFlipped = GeometryUtil.MustFlipCurve(defPlane, curve);
flipDirSense = !(wall.Flipped ^ curveFlipped);
}
}
else if (hostObject is Floor)
{
flipDirSense = false;
}
double offsetFromReferenceLine = flipDirSense ? -scaledOffset : scaledOffset;
IFCDirectionSense sense = flipDirSense ? IFCDirectionSense.Negative : IFCDirectionSense.Positive;
layerSetUsage = IFCInstanceExporter.CreateMaterialLayerSetUsage(file, materialLayerSet, direction, sense, offsetFromReferenceLine);
}
ExporterCacheManager.MaterialLayerRelationsCache.Add(layerSetUsage, elemHnd);
}
else
{
if (hasSubElems)
{
foreach (IFCAnyHandle subElemHnd in subElemHnds)
{
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(subElemHnd))
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(materialLayerSet, subElemHnd);
}
}
}
else if (!isRoof)
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(materialLayerSet, elemHnd);
}
else if (primaryMaterialHnd != null)
{
ExporterCacheManager.MaterialLayerRelationsCache.Add(primaryMaterialHnd, elemHnd);
}
}
}
}
tr.Commit();
return(true);
}
}
